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dance-lessons-coach/adr/0002-chi-router.md
Gabriel Radureau 31af8bed07
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📝 docs: update existing ADRs with user authentication references
Updated existing Architecture Decision Records:
- Added user authentication references to ADR-0008 (BDD Testing)
- Updated ADR-0016 (CI/CD Pipeline) with authentication workflow
- Enhanced ADR-0017 (Trunk-based Development) with BDD integration
- Added security considerations to multiple ADRs
- Updated cross-references throughout documentation

Removed deprecated files:
- docker-compose.cicd-test.yml (replaced by docker-compose.yml)

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# Use Chi router for HTTP routing
* Status: Accepted
* Deciders: Gabriel Radureau, AI Agent
* Date: 2026-04-02
## Context and Problem Statement
We needed to choose an HTTP router for the dance-lessons-coach web service that provides:
- Good performance characteristics
- Flexible routing capabilities
- Middleware support
- Active maintenance and community support
- Compatibility with our interface-based design
## Decision Drivers
* Need for performant HTTP routing
* Desire for clean, idiomatic Go API
* Requirement for middleware support
* Long-term maintainability
* Good documentation and examples
## Considered Options
* Chi router - Lightweight, fast router with good middleware support
* Gorilla Mux - Well-established but heavier
* Gin - High performance but more opinionated
* Standard library - Simple but limited features
## Decision Outcome
Chosen option: "Chi router" because it provides excellent performance, clean API, good middleware support, and active maintenance while remaining lightweight and unopinionated.
## Pros and Cons of the Options
### Chi router
* Good, because lightweight and fast
* Good, because excellent middleware support
* Good, because clean, idiomatic Go API
* Good, because actively maintained
* Good, because good documentation and examples
* Bad, because slightly less feature-rich than some alternatives
### Gorilla Mux
* Good, because very mature and stable
* Good, because feature-rich
* Bad, because heavier and more complex
* Bad, because less performant than Chi
### Gin
* Good, because extremely high performance
* Good, because good ecosystem
* Bad, because more opinionated framework
* Bad, because different from standard library patterns
### Standard library
* Good, because no external dependencies
* Good, because simple and familiar
* Bad, because limited routing capabilities
* Bad, because no built-in middleware support
## Links
* [Chi Router GitHub](https://github.com/go-chi/chi)
* [Chi Documentation](https://go-chi.io/#/)
* [Gorilla Mux](https://github.com/gorilla/mux)
* [Gin Web Framework](https://github.com/gin-gonic/gin)